CallbackPromiseAdapter types should be more compatible with WebCallbacks (3/3).

Source/modules/push_messaging/PushSubscriptionCallbacks.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/push_messaging/PushSubscriptionCallbacks.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/push_messaging/PushError.h"
 #include "modules/push_messaging/PushSubscription.h"
@@ skipping 23 matching lines @@
         return;
     }
     m_resolver->resolve(PushSubscription::take(m_resolver.get(), webPushSubscription, m_serviceWorkerRegistration));
 }
 
 void PushSubscriptionCallbacks::onError(WebPushError* error)
 {
     OwnPtr<WebPushError> ownError = adoptPtr(error);
     if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped())
         return;
-    m_resolver->reject(PushError::take(m_resolver.get(), ownError.release()));
+    m_resolver->reject(PushError::take(m_resolver.get(), *ownError));
 }
 
 } // namespace blink